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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: kernel-s5l8700.c 28795 2010-12-11 17:52:52Z Buschel $
*
* Copyright © 2009 Bertrik Sikken
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "system.h"
#include "kernel.h"
/* S5L8702 driver for the kernel timer
Timer B is configured as a 10 kHz timer
*/
void INT_TIMERB(void)
{
/* clear interrupt */
TBCON = TBCON;
call_tick_tasks(); /* Run through the list of tick tasks */
}
void tick_start(unsigned int interval_in_ms)
{
int cycles = 10 * interval_in_ms;
/* configure timer for 10 kHz (12 MHz / 16 / 75) */
TBCMD = (1 << 1); /* TB_CLR */
TBPRE = 75 - 1; /* prescaler */
TBCON = (0 << 13) | /* TB_INT1_EN */
(1 << 12) | /* TB_INT0_EN */
(0 << 11) | /* TB_START */
(2 << 8) | /* TB_CS = ECLK / 16 */
(1 << 6) | /* select ECLK (12 MHz) */
(0 << 4); /* TB_MODE_SEL = interval mode */
TBDATA0 = cycles; /* set interval period */
TBCMD = (1 << 0); /* TB_EN */
}
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